Chapter 12
Unlocking Watch App Performance

So far in this book, you’ve seen a lot of awesome features for the Apple Watch. None of them matter, however, unless your users want to keep using your app. An app that’s slow or unresponsive is more likely to be abandoned by its users than one that responds quickly and always shows the user what it’s doing. Good performance, aside from being faster for users, means your app will consume less energy.

In this chapter, we’re going to look at some common performance pitfalls on watchOS and some ways that you can mitigate them in your own code to have the smooth, quick app your users expect. We’ll also look at how Xcode’s tools can help you pinpoint slow code and make it fast again.